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Diffstat (limited to '')
-rw-r--r-- | src/boost/libs/hana/test/tuple/at.const.cpp | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/src/boost/libs/hana/test/tuple/at.const.cpp b/src/boost/libs/hana/test/tuple/at.const.cpp new file mode 100644 index 000000000..47d9b624c --- /dev/null +++ b/src/boost/libs/hana/test/tuple/at.const.cpp @@ -0,0 +1,50 @@ +// Copyright Louis Dionne 2013-2017 +// Distributed under the Boost Software License, Version 1.0. +// (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt) + +#include <boost/hana/assert.hpp> +#include <boost/hana/tuple.hpp> + +#include <string> +namespace hana = boost::hana; + + +struct Empty { }; + +int main() { + { + using T = hana::tuple<int>; + const T t(3); + BOOST_HANA_RUNTIME_CHECK(hana::at_c<0>(t) == 3); + } + { + using T = hana::tuple<std::string, int>; + const T t("high", 5); + BOOST_HANA_RUNTIME_CHECK(hana::at_c<0>(t) == "high"); + BOOST_HANA_RUNTIME_CHECK(hana::at_c<1>(t) == 5); + } + { + using T = hana::tuple<double, int>; + constexpr T t(2.718, 5); + static_assert(hana::at_c<0>(t) == 2.718, ""); + static_assert(hana::at_c<1>(t) == 5, ""); + } + { + using T = hana::tuple<Empty>; + constexpr T t{Empty()}; + constexpr Empty e = hana::at_c<0>(t); (void)e; + } + { + using T = hana::tuple<double&, std::string, int>; + double d = 1.5; + const T t(d, "high", 5); + BOOST_HANA_RUNTIME_CHECK(hana::at_c<0>(t) == 1.5); + BOOST_HANA_RUNTIME_CHECK(hana::at_c<1>(t) == "high"); + BOOST_HANA_RUNTIME_CHECK(hana::at_c<2>(t) == 5); + hana::at_c<0>(t) = 2.5; + BOOST_HANA_RUNTIME_CHECK(hana::at_c<0>(t) == 2.5); + BOOST_HANA_RUNTIME_CHECK(hana::at_c<1>(t) == "high"); + BOOST_HANA_RUNTIME_CHECK(hana::at_c<2>(t) == 5); + BOOST_HANA_RUNTIME_CHECK(d == 2.5); + } +} |